/Engine/Source/Runtime/HeadMountedDisplay/Public/HeadMountedDisplayTypes.h
FSpectatorScreenModeTexturePlusEyeLayout ( FVector2D InEyeRectMin, FVector2D InEyeRectMax, FVector2D InTextureRectMin, FVector2D InTextureRectMax, bool InbDrawEyeFirst, bool InbClearBlack, bool InbUseAlpha )